Why does potassium give off a purple flame in flame test?

Answer 1

The energy from the heat of the fire makes one of the electrons in potassium jump up to a higher energy level. When it drops back down, the energy difference between the higher level and the one it emits the energy in the form of a photon. Since the energy of each level is fixed, only photons with certain energies (and hence certain colors) can be emitted. For potassium, one of those permitted energies happens to correspond to a photon of a particular shade of violet. The energy levels (and therefore the differences between energy levels) are different for every element. For sodium, there are two permitted energies close together in the orange-yellow part of the spectrum, so sodium turns fire orangeish-yellow; rubidium has a strong line in the red, and caesium has two bright lines in the blue (the names rubidium and caesium come from the Latin words for deep red and sky blue respectively).

Answer 2

Potassium gives off a purple flame in a flame test due to the presence of potassium ions in the sample. When the sample is heated in a flame, the electrons in the potassium ions are excited to higher energy levels. As these electrons return to their original energy levels, they emit light in the visible spectrum, with the characteristic purple color being produced by potassium. This phenomenon is known as atomic emission spectroscopy and is used to identify the presence of specific elements in a sample based on the color of the flame produced.

Answer 3

Potassium gives off a lilac purple color due to the energy level configuration of the potassium atom. When heated the electrons become excited to higher levels of energy. When they "move" to a lower energy state, they give off energy in the form of light (photons). The color seen by your eye is a combination of certain specific colors (frequencies) of photons. It is the same as when you hear a musical chord. It is actually a combination of several different musical notes (frequencies).

Answer 4

Potassium gives off a lilac purple color due to the energy level configuration of the potassium atom. When heated the electrons become excited to higher levels of energy. When they "move" to a lower energy state, they give off energy in the form of light (photons). The color seen by your eye is a combination of certain specific colors (frequencies) of photons. It is the same as when you hear a musical chord. It is actually a combination of several different musical notes (frequencies). A web search for "flame test spectrum", or something similar, will show the colors involved.

Answer 5

Potassium gives off a purple flame in a flame test due to the excitation of electrons in the potassium atoms. When heat is applied, the electrons absorb energy and move to higher energy levels, and when they return to their ground state, they emit energy in the form of visible light, which appears purple in the case of potassium.

Answer 6

A characteristic line in the emission spectrum of potassium has this color.

Answer 7

Important is the metal - potassium - and his spectral lines.